Water-motor



(No Model.) 2 Sheets-Sheet 1.

J. H. HAGBRTY.

WATER MOTOR. N0. 344,960. Patent July 6, 1886.

6 u V/ltr' EESEE .Wfmwm 7m (No Model.)

J. H. HAGERTY.

WATER MOTOR.

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vJOHN H. HAGE'RTY, OF LOWELL, MASSACHUSETTS.

WATER-MOTO R.

SPECEFIGATION forming part of Letters Patent No. 344,960, dated July 6, 1886.

.\ pplicntion filed November 9, 1895. Serial No. $2,228. (No model.)

T0 all 11171/0771/ t may con/ecrit.-

Be it known that I, JOHN H. I-IAGERTY, of Lowell, in the county Middlesex and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Water-Motors, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification in explaining its nature.

This invention relates to a. means of utilizing moderate heads of water, particularly tidal heads, for the purpose of obtaining power.

In the drawings, Figure l is a view, partly in section and party in elevation, of an apparatus constructed according to this invention. Fig. 2 is a modified form of the apparatus embodying the same principle.

Like letters represent like parts in both figures.

In Fig. l between a and b is supposed to be a water-space, in which tide-water rises and falls, the highest -level being at a and the lowest at b. A masonry wall, A, is erected along the border of the water, and a pit, B, is made in the bank or shore at a short distance from the water,asecondpitofmuch greatersize being made at C, a short dist-ance ofi'. The two pits, B and O, are connected by a channel or passage, D,which is controllable by a valve, d. Another passage, E, leads from the water-space into the pit B at a lowlevel, and is controlled by the valve c. Beneath the pit Bis asmaller pit, F, the same being bnshed at its top with a stuffing-box, and communicating with the water-space outside by the pipe H, controlled by a checlevalve, h, and with a reservoir, D3, by another passage, I, controlled by a checkvalve, z'. The valve h opens toward the pit F, and the valve z' opens from it. A float, K, having a plunger, k, below it, which plunger 7c fits tightly the stuffing-box G, is placed in the pit B, and the plunger extends into the pitF through the stufiing-box G. If, now, the water is at the head a, the float K at its lowest position, and the plunger 7c of course at its lowest position, the valve e opened and the valve d shut, and the iloat and the plunger together weigh a little less than water, which can readily be accomplished by making them hollow and loading them with water or other load, and water be admitted through the pipe E, the plunger and float will be buoyed upon the surface of the water, and will rise to theV top of the pit to a level with the water outside,

drawing in some water through the pipe H, which runs to the low level of water in the sea or river through the bed of the sea or river. (Indicated at L.) The valveebeing now shut and the valve d opened, the water beneath the iioat K will run off into the larger reservoir, G,which should be of sufficient size to hold all the water necessary to be used during a tide, and to readily be emptied into tidewater at low tide, and as the water runs off into lthe pipe D Ypast the valve tl the plunger 7c and its float K will fall, exercising thepressure due to its weight upon the water in the Vpit F, and will forceit out through the checkused for any purpose for which it is desirable to use water which has been pumped to a higher level than that which it occupied before it was pumped, and for which its quality, quantity, and head may be suitable.

The reservoir C, for the waste, must be many times larger than the pit in which the plunger plays. The height to which the iloat rises will be regulated and governed by the height of the water from which the supply comes. As this falls the upward stroke of the iioat and plunger will be shortened. As the water in the wastereservoir C rises the downward stroke will be shortened. The speed of the strokes will be greater when the plunger is raised highest and the waste-reservoir U is least full, because the water will run off from below the float faster in such cases. In case the level of water in the waste-reservoir C should rise to the height ofthe source of supply, which might be the case atihalf-tide or so, there would be an intermission of pumping; but with a proper size of waste-reservoir C the work of pumping could be continued from full tide to halftide, or even further. Of course the size of inlet and eduction pipes from beneath the iioat K would affect the speed of work.

The reservoir ID3 is illustrated for the purpose of moving the valves in pipes d2 d as a stand-pipe with a delivery as well as a force IOS) main. In this the fluctuations of head in the stand-pipe affect the position of the float D2, raising or lowering it. A rod having a rack ou its lower end operates a double-valve motion, which controls the valves of pipes d2 d, and thereby throws the valves of the motors, which motor-valves control the induction and exhaust of the cylinders of the motors; but as the details of these motors are not to be claimed in this application,h nor the motors themselves necessary to the working of the valves in pipes D and E,which can be done by hand, and as persons acquainted with the valve mechanism of double-acting steam-pumps cau readily devise the valve mechanism of these motors, it is not further described herein.

The valves d c may be moved by hand, and for the purpose of this application this is all that is necessary; or two small motors may be employed to actuate these valves, as indicated in Fig.y l. These motors are lettered, respectively, d e', and the stroke of the motor in one direction opens the valve by an ordinary crank-action, and in'the other shuts it. The water f or these two motors e e is supplied by pipes (ll d, which arev governed by valves d d5, and these valves are worked by the rise and fall of a plunger, D2, in a cylinder, D, which is actuated by the water thrown by the deseent'of the plunger 7c in any familiar way of working the valves of direct-acting steaur pumps. This method of automatically operating thc valves d e by a portion of the water raised is, however, no essential part of this invention.

In Fig. 2 is shown' a modification of this device. The pit B and its conuectingpipes D and E and relievingpit C are all substantially similar to those shown in the drawings,

Fig. l; butin lieu of a single-acting plunger-n pump there is a doubleacting piston-pump, M, placed above the float K and actuated from it. The water to be forced is drawn through the pipe H2 into the reservoir H, and thence in the piston-pump M, from which, through the pipe l2, it is forced into the cylinder D3, in which is the plunger D2. A water-motor,

N, of any proper form, is employed to utilize the power obtained by this apparatus, and it can readily be seen that the pressure upon this motor can be made very great, and that high `'speeds can be obtained, the power obtainable being such as is due to the weight of the float K and its fall in feet.

eduction pipesand valves, is obvious] y a merc substitution of a double-acting piston-pump for its exact mechanical equivalent as a waterraising enginethe plunger-pump K F, with its induction and eduction pipes and valves.

This apparatus is in substance a contrivance for converting the foot-pounds ofa large quantity of water of small head into the footpounds of a smaller quantity of water with a larger head, by means of a force-pump actuated by a oat of comparatively great area, weight, and buoyancy.

In proportioning the size and weight of parts it will be remembered that the area of the plunger 7c being greater than that of the pipe leading to the reservoir the pressure to hold up the plunger and fioat will be as many times the weight of the water in the pipe leading to the reservoir as thc area of the plunger k is times the arca of the pipe to the reservoir. The combined weight of float and plunger must exceed this. The area of the lioat must be sufficient to give it buoyancy when valve c is open and valve d is shut..

The iioatand plunger of Fig. l are shown hollow, and in order to regulate their weight and buoyancy may be loaded with water.

It is obvious that this apparatus without the reservoir is a pump adapted to raise water from one level to another without storing it, and is intended to be so used.

I claim as my invention and desire 'to secure by Letters Patent of the United States- 41. The combination, with a source of watersupply and a drainage-area, C, of considerable size, of the pits B F, channels D E, valves d e. d rait and force mains, and float and plunger K k, proportioned to each other and to the work to be done, substantially as described.

2. The combination of the source of watersupply, drainage-area, draft and force lnains, pits B F. channels D E, valves d e, float and plunger K lc, with the reservoir D", substantially as described.

JOHN H. HAGERTY.

Titnessesz Jas. H. CARMIGHAEL, JOHN A. GILBRIDE.

lhc part-des ignated as pump M, with its induction and 

